Question 2

Identify the number that does NOT belong in the given series.
5, 9, 17, 29, 55, 65

Solution

$$5+4=9,\ 9+4\times\ 2=17,\ 17+4\times\ 3=29,\ 29+4\times\ 4=45,45+4\times\ 5=65.$$

So, it should be 45, not 55.

Hence, A is correct choice.

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